| 1 | /* $Id: dir-nt-bird.c 2862 2016-09-02 02:39:56Z bird $ */
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| 2 | /** @file
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| 3 | * Reimplementation of dir.c for NT using kFsCache.
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| 4 | *
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| 5 | * This should perform better on NT, especially on machines "infected"
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| 6 | * by antivirus programs.
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| 7 | */
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| 8 |
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| 9 | /*
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| 10 | * Copyright (c) 2016 knut st. osmundsen <bird-kBuild-spamx@anduin.net>
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| 11 | *
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| 12 | * This file is part of kBuild.
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| 13 | *
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| 14 | * kBuild is free software; you can redistribute it and/or modify
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| 15 | * it under the terms of the GNU General Public License as published by
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| 16 | * the Free Software Foundation; either version 3 of the License, or
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| 17 | * (at your option) any later version.
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| 18 | *
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| 19 | * kBuild is distributed in the hope that it will be useful,
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| 20 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 21 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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| 22 | * GNU General Public License for more details.
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| 23 | *
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| 24 | * You should have received a copy of the GNU General Public License
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| 25 | * along with kBuild. If not, see <http://www.gnu.org/licenses/>
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| 26 | *
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| 27 | */
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| 28 |
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| 29 |
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| 30 | /*********************************************************************************************************************************
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| 31 | * Header Files *
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| 32 | *********************************************************************************************************************************/
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| 33 | #include "nt/kFsCache.h"
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| 34 | #include "make.h"
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| 35 | #if defined(KMK) && !defined(__OS2__)
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| 36 | # include "glob/glob.h"
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| 37 | #else
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| 38 | # include <glob.h>
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| 39 | #endif
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| 40 |
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| 41 |
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| 42 | #include "nt_fullpath.h" /* for the time being - will be implemented here later on. */
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| 43 |
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| 44 |
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| 45 | /*********************************************************************************************************************************
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| 46 | * Defined Constants And Macros *
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| 47 | *********************************************************************************************************************************/
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| 48 | /** User data key indicating that it's an impossible file to make.
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| 49 | * See file_impossible() and file_impossible_p(). */
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| 50 | #define KMK_DIR_NT_IMPOSSIBLE_KEY (~(KUPTR)7)
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| 51 |
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| 52 |
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| 53 | /*********************************************************************************************************************************
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| 54 | * Structures and Typedefs *
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| 55 | *********************************************************************************************************************************/
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| 56 | /**
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| 57 | * glob directory stream.
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| 58 | */
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| 59 | typedef struct KMKNTOPENDIR
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| 60 | {
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| 61 | /** Reference to the directory. */
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| 62 | PKFSDIR pDir;
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| 63 | /** Index of the next directory entry (child) to return. */
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| 64 | KU32 idxNext;
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| 65 | /** The structure in which to return the directory entry. */
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| 66 | struct dirent DirEnt;
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| 67 | } KMKNTOPENDIR;
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| 68 |
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| 69 |
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| 70 | /*********************************************************************************************************************************
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| 71 | * Global Variables *
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| 72 | *********************************************************************************************************************************/
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| 73 | PKFSCACHE g_pFsCache = NULL;
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| 74 |
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| 75 |
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| 76 | void hash_init_directories(void)
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| 77 | {
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| 78 | g_pFsCache = kFsCacheCreate(0);
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| 79 | if (g_pFsCache)
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| 80 | return;
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| 81 | fputs("kFsCacheCreate failed!", stderr);
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| 82 | exit(9);
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| 83 | }
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| 84 |
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| 85 |
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| 86 | /**
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| 87 | * Checks if @a pszName exists in directory @a pszDir.
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| 88 | *
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| 89 | * @returns 1 if it does, 0 if it doesn't.
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| 90 | *
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| 91 | * @param pszDir The directory.
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| 92 | * @param pszName The name.
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| 93 | *
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| 94 | * If empty string, just check if the directory exists.
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| 95 | *
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| 96 | * If NULL, just read the whole cache the directory into
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| 97 | * the cache (we always do that).
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| 98 | */
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| 99 | int dir_file_exists_p(const char *pszDir, const char *pszName)
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| 100 | {
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| 101 | int fRc = 0;
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| 102 | KFSLOOKUPERROR enmError;
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| 103 | PKFSOBJ pDirObj = kFsCacheLookupA(g_pFsCache, pszDir, &enmError);
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| 104 | if (pDirObj)
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| 105 | {
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| 106 | if (pDirObj->bObjType == KFSOBJ_TYPE_DIR)
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| 107 | {
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| 108 | if (pszName != 0)
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| 109 | {
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| 110 | /* Empty filename is just checking out the directory. */
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| 111 | if (*pszName == '\0')
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| 112 | fRc = 1;
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| 113 | else
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| 114 | {
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| 115 | PKFSOBJ pNameObj = kFsCacheLookupRelativeToDirA(g_pFsCache, (PKFSDIR)pDirObj,
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| 116 | pszName, strlen(pszName), &enmError);
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| 117 | if (pNameObj)
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| 118 | {
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| 119 | fRc = pNameObj->bObjType == KFSOBJ_TYPE_MISSING;
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| 120 | kFsCacheObjRelease(g_pFsCache, pNameObj);
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| 121 | }
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| 122 | }
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| 123 | }
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| 124 | }
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| 125 | kFsCacheObjRelease(g_pFsCache, pDirObj);
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| 126 | }
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| 127 | return fRc;
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| 128 | }
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| 129 |
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| 130 |
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| 131 | /**
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| 132 | * Checks if a file exists.
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| 133 | *
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| 134 | * @returns 1 if it does exist, 0 if it doesn't.
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| 135 | * @param pszPath The path to check out.
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| 136 | */
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| 137 | int file_exists_p(const char *pszPath)
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| 138 | {
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| 139 | int fRc;
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| 140 | KFSLOOKUPERROR enmError;
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| 141 | PKFSOBJ pPathObj = kFsCacheLookupA(g_pFsCache, pszPath, &enmError);
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| 142 | if (pPathObj)
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| 143 | {
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| 144 | fRc = pPathObj->bObjType != KFSOBJ_TYPE_MISSING;
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| 145 | kFsCacheObjRelease(g_pFsCache, pPathObj);
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| 146 | }
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| 147 | else
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| 148 | fRc = 0;
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| 149 | return fRc;
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| 150 | }
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| 151 |
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| 152 |
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| 153 | /**
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| 154 | * Just a way for vpath.c to get a correctly cased path, I think.
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| 155 | *
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| 156 | * @returns Directory path in string cache.
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| 157 | * @param pszDir The directory.
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| 158 | */
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| 159 | const char *dir_name(const char *pszDir)
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| 160 | {
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| 161 | char szTmp[MAX_PATH];
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| 162 | nt_fullpath(pszDir, szTmp, sizeof(szTmp));
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| 163 | return strcache_add(szTmp);
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| 164 | }
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| 165 |
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| 166 |
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| 167 | /**
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| 168 | * Makes future file_impossible_p calls return 1 for pszPath.
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| 169 | */
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| 170 | void file_impossible(const char *pszPath)
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| 171 | {
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| 172 | KFSLOOKUPERROR enmError;
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| 173 | PKFSOBJ pPathObj = kFsCacheLookupA(g_pFsCache, pszPath, &enmError);
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| 174 | if (pPathObj)
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| 175 | {
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| 176 | kFsCacheObjAddUserData(g_pFsCache, pPathObj, KMK_DIR_NT_IMPOSSIBLE_KEY, sizeof(KFSUSERDATA));
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| 177 | kFsCacheObjRelease(g_pFsCache, pPathObj);
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| 178 | }
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| 179 | }
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| 180 |
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| 181 | /**
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| 182 | * Makes future file_impossible_p calls return 1 for pszPath.
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| 183 | */
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| 184 | int file_impossible_p(const char *pszPath)
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| 185 | {
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| 186 | int fRc;
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| 187 | KFSLOOKUPERROR enmError;
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| 188 | PKFSOBJ pPathObj = kFsCacheLookupA(g_pFsCache, pszPath, &enmError);
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| 189 | if (pPathObj)
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| 190 | {
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| 191 | fRc = kFsCacheObjGetUserData(g_pFsCache, pPathObj, KMK_DIR_NT_IMPOSSIBLE_KEY) != NULL;
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| 192 | kFsCacheObjRelease(g_pFsCache, pPathObj);
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| 193 | }
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| 194 | else
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| 195 | fRc = 0;
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| 196 | return fRc;
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| 197 | }
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| 198 |
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| 199 |
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| 200 | /**
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| 201 | * opendir for glob.
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| 202 | *
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| 203 | * @returns Pointer to DIR like handle, NULL if directory not found.
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| 204 | * @param pszDir The directory to enumerate.
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| 205 | */
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| 206 | static __ptr_t dir_glob_opendir(const char *pszDir)
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| 207 | {
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| 208 | KFSLOOKUPERROR enmError;
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| 209 | PKFSOBJ pDirObj = kFsCacheLookupA(g_pFsCache, pszDir, &enmError);
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| 210 | if (pDirObj)
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| 211 | {
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| 212 | if (pDirObj->bObjType == KFSOBJ_TYPE_DIR)
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| 213 | {
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| 214 | if (kFsCacheDirEnsurePopuplated(g_pFsCache, (PKFSDIR)pDirObj, NULL))
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| 215 | {
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| 216 | KMKNTOPENDIR *pDir = xmalloc(sizeof(*pDir));
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| 217 | pDir->pDir = (PKFSDIR)pDirObj;
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| 218 | pDir->idxNext = 0;
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| 219 | return pDir;
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| 220 | }
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| 221 | }
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| 222 | kFsCacheObjRelease(g_pFsCache, pDirObj);
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| 223 | }
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| 224 | return NULL;
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| 225 | }
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| 226 |
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| 227 |
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| 228 | /**
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| 229 | * readdir for glob.
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| 230 | *
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| 231 | * @returns Pointer to DIR like handle, NULL if directory not found.
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| 232 | * @param pDir Directory enum handle by dir_glob_opendir.
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| 233 | */
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| 234 | static struct dirent *dir_glob_readdir(__ptr_t pvDir)
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| 235 | {
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| 236 | KMKNTOPENDIR *pDir = (KMKNTOPENDIR *)pvDir;
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| 237 | KU32 const cChildren = pDir->pDir->cChildren;
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| 238 | while (pDir->idxNext < cChildren)
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| 239 | {
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| 240 | PKFSOBJ pEntry = pDir->pDir->papChildren[pDir->idxNext++];
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| 241 |
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| 242 | /* Don't return missing objects. */
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| 243 | if (pEntry->bObjType != KFSOBJ_TYPE_MISSING)
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| 244 | {
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| 245 | /* Copy the name that fits. If neither fits, skip the name. */
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| 246 | if (pEntry->cchName < sizeof(pDir->DirEnt.d_name))
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| 247 | {
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| 248 | pDir->DirEnt.d_namlen = pEntry->cchName;
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| 249 | memcpy(pDir->DirEnt.d_name, pEntry->pszName, pEntry->cchName + 1);
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| 250 | }
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| 251 | else if (pEntry->cchShortName < sizeof(pDir->DirEnt.d_name))
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| 252 | {
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| 253 | pDir->DirEnt.d_namlen = pEntry->cchShortName;
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| 254 | memcpy(pDir->DirEnt.d_name, pEntry->pszShortName, pEntry->cchShortName + 1);
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| 255 | }
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| 256 | else
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| 257 | continue;
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| 258 |
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| 259 | pDir->DirEnt.d_reclen = offsetof(struct dirent, d_name) + pDir->DirEnt.d_namlen;
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| 260 | if (pEntry->bObjType == KFSOBJ_TYPE_DIR)
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| 261 | pDir->DirEnt.d_type = DT_DIR;
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| 262 | else if (pEntry->bObjType == KFSOBJ_TYPE_FILE)
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| 263 | pDir->DirEnt.d_type = DT_REG;
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| 264 | else
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| 265 | pDir->DirEnt.d_type = DT_UNKNOWN;
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| 266 |
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| 267 | return &pDir->DirEnt;
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| 268 | }
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| 269 | }
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| 270 |
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| 271 | /*
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| 272 | * Fake the '.' and '..' directories because they're not part of papChildren above.
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| 273 | */
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| 274 | if (pDir->idxNext < cChildren + 2)
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| 275 | {
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| 276 | pDir->idxNext++;
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| 277 | pDir->DirEnt.d_type = DT_DIR;
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| 278 | pDir->DirEnt.d_namlen = pDir->idxNext - cChildren;
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| 279 | pDir->DirEnt.d_reclen = offsetof(struct dirent, d_name) + pDir->DirEnt.d_namlen;
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| 280 | pDir->DirEnt.d_name[0] = '.';
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| 281 | pDir->DirEnt.d_name[1] = '.';
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| 282 | pDir->DirEnt.d_name[pDir->DirEnt.d_namlen] = '\0';
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| 283 | return &pDir->DirEnt;
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| 284 | }
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| 285 |
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| 286 | return NULL;
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| 287 | }
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| 288 |
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| 289 |
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| 290 | /**
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| 291 | * closedir for glob.
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| 292 | *
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| 293 | * @param pDir Directory enum handle by dir_glob_opendir.
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| 294 | */
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| 295 | static void dir_glob_closedir(__ptr_t pvDir)
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| 296 | {
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| 297 | KMKNTOPENDIR *pDir = (KMKNTOPENDIR *)pvDir;
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| 298 | kFsCacheObjRelease(g_pFsCache, &pDir->pDir->Obj);
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| 299 | pDir->pDir = NULL;
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| 300 | free(pDir);
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| 301 | }
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| 302 |
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| 303 |
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| 304 | /**
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| 305 | * stat for glob.
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| 306 | *
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| 307 | * @returns 0 on success, -1 + errno on failure.
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| 308 | * @param pszPath The path to stat.
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| 309 | * @param pStat Where to return the info.
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| 310 | */
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| 311 | static int dir_glob_stat(const char *pszPath, struct stat *pStat)
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| 312 | {
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| 313 | KFSLOOKUPERROR enmError;
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| 314 | PKFSOBJ pPathObj = kFsCacheLookupA(g_pFsCache, pszPath, &enmError);
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| 315 | /** @todo follow symlinks vs. on symlink! */
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| 316 | if (pPathObj)
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| 317 | {
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| 318 | if (pPathObj->bObjType != KFSOBJ_TYPE_MISSING)
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| 319 | {
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| 320 | kHlpAssert(pPathObj->fHaveStats); /* currently always true. */
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| 321 | *pStat = pPathObj->Stats;
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| 322 | kFsCacheObjRelease(g_pFsCache, pPathObj);
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| 323 | return 0;
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| 324 | }
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| 325 | kFsCacheObjRelease(g_pFsCache, pPathObj);
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| 326 | }
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| 327 | errno = ENOENT;
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| 328 | return -1;
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| 329 | }
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| 330 |
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| 331 |
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| 332 | /**
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| 333 | * lstat for glob.
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| 334 | *
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| 335 | * @returns 0 on success, -1 + errno on failure.
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| 336 | * @param pszPath The path to stat.
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| 337 | * @param pStat Where to return the info.
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| 338 | */
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| 339 | static int dir_glob_lstat(const char *pszPath, struct stat *pStat)
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| 340 | {
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| 341 | KFSLOOKUPERROR enmError;
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| 342 | PKFSOBJ pPathObj = kFsCacheLookupA(g_pFsCache, pszPath, &enmError);
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| 343 | if (pPathObj)
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| 344 | {
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| 345 | if (pPathObj->bObjType != KFSOBJ_TYPE_MISSING)
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| 346 | {
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| 347 | kHlpAssert(pPathObj->fHaveStats); /* currently always true. */
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| 348 | *pStat = pPathObj->Stats;
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| 349 | kFsCacheObjRelease(g_pFsCache, pPathObj);
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| 350 | return 0;
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| 351 | }
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| 352 | kFsCacheObjRelease(g_pFsCache, pPathObj);
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| 353 | errno = ENOENT;
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| 354 | }
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| 355 | else
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| 356 | errno = enmError == KFSLOOKUPERROR_NOT_DIR
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| 357 | || enmError == KFSLOOKUPERROR_PATH_COMP_NOT_DIR
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| 358 | ? ENOTDIR : ENOENT;
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| 359 |
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| 360 | return -1;
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| 361 | }
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| 362 |
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| 363 |
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| 364 | /**
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| 365 | * Checks if @a pszDir exists and is a directory.
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| 366 | *
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| 367 | * @returns 1 if is directory, 0 if isn't or doesn't exists.
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| 368 | * @param pszDir The alleged directory.
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| 369 | */
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| 370 | static int dir_globl_dir_exists_p(const char *pszDir)
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| 371 | {
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| 372 | int fRc;
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| 373 | KFSLOOKUPERROR enmError;
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| 374 | PKFSOBJ pDirObj = kFsCacheLookupA(g_pFsCache, pszDir, &enmError);
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| 375 | if (pDirObj)
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| 376 | {
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| 377 | fRc = pDirObj->bObjType == KFSOBJ_TYPE_DIR;
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| 378 | kFsCacheObjRelease(g_pFsCache, pDirObj);
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| 379 | }
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| 380 | else
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| 381 | fRc = 0;
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| 382 | return fRc;
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| 383 |
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| 384 | }
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| 385 |
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| 386 |
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| 387 | /**
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| 388 | * Sets up pGlob with the necessary callbacks.
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| 389 | *
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| 390 | * @param pGlob Structure to populate.
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| 391 | */
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| 392 | void dir_setup_glob(glob_t *pGlob)
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| 393 | {
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| 394 | pGlob->gl_opendir = dir_glob_opendir;
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| 395 | pGlob->gl_readdir = dir_glob_readdir;
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| 396 | pGlob->gl_closedir = dir_glob_closedir;
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| 397 | pGlob->gl_stat = dir_glob_stat;
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| 398 | #ifdef __EMX__ /* The FreeBSD implementation actually uses gl_lstat!! */
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| 399 | pGlob->gl_lstat = dir_glob_lstat;
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| 400 | #else
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| 401 | pGlob->gl_exists = file_exists_p;
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| 402 | pGlob->gl_isdir = dir_globl_dir_exists_p;
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| 403 | #endif
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| 404 | }
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| 405 |
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| 406 |
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| 407 | void print_dir_data_base(void)
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| 408 | {
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| 409 | /** @todo. */
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| 410 | }
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| 411 |
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| 412 |
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| 413 |
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| 414 | void nt_fullpath_cached(const char *pszPath, char *pszFull, size_t cbFull)
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| 415 | {
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| 416 | KFSLOOKUPERROR enmError;
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| 417 | PKFSOBJ pPathObj = kFsCacheLookupA(g_pFsCache, pszPath, &enmError);
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| 418 | if (pPathObj)
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| 419 | {
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| 420 | KSIZE off = pPathObj->cchParent;
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| 421 | if (off > 0)
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| 422 | {
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| 423 | KSIZE offEnd = off + pPathObj->cchName;
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| 424 | if (offEnd < cbFull)
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| 425 | {
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| 426 | PKFSDIR pAncestor;
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| 427 |
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| 428 | pszFull[off + pPathObj->cchName] = '\0';
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| 429 | memcpy(&pszFull[off], pPathObj->pszName, pPathObj->cchName);
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| 430 |
|
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| 431 | for (pAncestor = pPathObj->pParent; off > 0; pAncestor = pAncestor->Obj.pParent)
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| 432 | {
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|---|
| 433 | kHlpAssert(off > 1);
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| 434 | kHlpAssert(pAncestor != NULL);
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| 435 | kHlpAssert(pAncestor->ObjcchName > 0);
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|---|
| 436 | pszFull[--off] = '/';
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|---|
| 437 | off -= pAncestor->Obj.cchName;
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|---|
| 438 | kHlpAssert(pAncestor->Obj.cchParent == off);
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|---|
| 439 | memcpy(&pszFull[off], pAncestor->Obj.pszName, pAncestor->Obj.cchName);
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| 440 | }
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| 441 | kFsCacheObjRelease(g_pFsCache, pPathObj);
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| 442 | return;
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|---|
| 443 | }
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| 444 | }
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| 445 | else
|
|---|
| 446 | {
|
|---|
| 447 | if (pPathObj->cchName + 1 < cbFull)
|
|---|
| 448 | {
|
|---|
| 449 | memcpy(pszFull, pPathObj->pszName, pPathObj->cchName);
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|---|
| 450 | pszFull[pPathObj->cchName] = '/';
|
|---|
| 451 | pszFull[pPathObj->cchName + 1] = '\0';
|
|---|
| 452 |
|
|---|
| 453 | kFsCacheObjRelease(g_pFsCache, pPathObj);
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|---|
| 454 | return;
|
|---|
| 455 | }
|
|---|
| 456 | }
|
|---|
| 457 |
|
|---|
| 458 | /* do fallback. */
|
|---|
| 459 | kHlpAssertFailed();
|
|---|
| 460 | kFsCacheObjRelease(g_pFsCache, pPathObj);
|
|---|
| 461 | }
|
|---|
| 462 |
|
|---|
| 463 | nt_fullpath(pszPath, pszFull, cbFull);
|
|---|
| 464 | }
|
|---|
| 465 |
|
|---|
| 466 |
|
|---|
| 467 | /**
|
|---|
| 468 | * Special stat call used by remake.c
|
|---|
| 469 | *
|
|---|
| 470 | * @returns 0 on success, -1 + errno on failure.
|
|---|
| 471 | * @param pszPath The path to stat.
|
|---|
| 472 | * @param pStat Where to return the mtime field only.
|
|---|
| 473 | */
|
|---|
| 474 | int stat_only_mtime(const char *pszPath, struct stat *pStat)
|
|---|
| 475 | {
|
|---|
| 476 | KFSLOOKUPERROR enmError;
|
|---|
| 477 | PKFSOBJ pPathObj = kFsCacheLookupA(g_pFsCache, pszPath, &enmError);
|
|---|
| 478 | if (pPathObj)
|
|---|
| 479 | {
|
|---|
| 480 | if (pPathObj->bObjType != KFSOBJ_TYPE_MISSING)
|
|---|
| 481 | {
|
|---|
| 482 | kHlpAssert(pPathObj->fHaveStats); /* currently always true. */
|
|---|
| 483 | pStat->st_mtime = pPathObj->Stats.st_mtime;
|
|---|
| 484 | kFsCacheObjRelease(g_pFsCache, pPathObj);
|
|---|
| 485 | return 0;
|
|---|
| 486 | }
|
|---|
| 487 |
|
|---|
| 488 | kFsCacheObjRelease(g_pFsCache, pPathObj);
|
|---|
| 489 | errno = ENOENT;
|
|---|
| 490 | }
|
|---|
| 491 | else
|
|---|
| 492 | errno = enmError == KFSLOOKUPERROR_NOT_DIR
|
|---|
| 493 | || enmError == KFSLOOKUPERROR_PATH_COMP_NOT_DIR
|
|---|
| 494 | ? ENOTDIR : ENOENT;
|
|---|
| 495 | return -1;
|
|---|
| 496 | }
|
|---|
| 497 |
|
|---|
| 498 |
|
|---|
| 499 | /**
|
|---|
| 500 | * Invalidate missing bits of the directory cache.
|
|---|
| 501 | *
|
|---|
| 502 | * This is called each time a make job completes.
|
|---|
| 503 | */
|
|---|
| 504 | void dir_cache_invalid_missing(void)
|
|---|
| 505 | {
|
|---|
| 506 | kFsCacheInvalidateAll(g_pFsCache);
|
|---|
| 507 | }
|
|---|
| 508 |
|
|---|